Yuav ua li cas optimize cov txheej txheem txhaj tshuaj molding?

Kev txhim kho ntxiv ntawm cov cuab yeej txhaj tshuaj thiab kev txhim kho tas mus li ntawm cov khoom lag luam uas yuav tsum tau ua kom muaj kev xav tau ntau dua rau kev txhaj tshuaj molding tshuab. Kev xaiv cov cuab yeej txhaj tshuaj kom raug, tsim nyog ntawm cov txheej txheem molding thiab kev ua kom zoo ntawm cov txheej txheem yog cov yuam sij los txhim kho cov khoom zoo.
Kev xaiv raug ntawm kev txhaj tshuaj molding tshuab
Kev ua haujlwm ntawm kev txhaj tshuaj molding tshuab ncaj qha cuam tshuam rau qhov zoo ntawm kev txhaj tshuaj molding khoom. Tus nqi ntawm kev txhaj tshuaj molding tshuab nrog txawv specifications thiab kev ua tau zoo yuav txawv heev.
Specification xaiv ntawm kev txhaj tshuaj molding tshuab
Thaum xaiv qhov tshwj xeeb ntawm kev txhaj tshuaj molding tshuab, peb yuav tsum xub xav txog qhov xwm txheej ntawm cov pwm tsim, vim tias tib lub tshuab txhaj tshuaj molding feem ntau yuav tsum tau ua kom tau raws li qhov tsim ntawm ntau cov pwm nrog ntau qhov sib txawv. Peb yuav tsum txiav txim siab qhov tshwj xeeb ntawm kev txhaj tshuaj molding tshuab raws li qhov hnyav ntawm qhov chaw, pwm loj, thiab lwm yam, uas yog, qhov siab tshaj plaws ntawm qhov ntsuas phoo thiab qhov siab tshaj plaws txhaj tshuaj ntim ntawm lub tshuab txhaj tshuaj molding, thiab tom qab ntawd xaiv cov qauv tsim nyog raws li cov specifications thiab cov qauv muab los ntawm kev txhaj tshuaj molding tshuab chaw tsim tshuaj paus. Feem ntau cov tuam ntxhab muab cov kev pabcuam customized, uas muab kev yooj yim zoo rau kev yuav cov tshuab txhaj tshuaj molding; Qhov thib ob, nws yog ib qho tsim nyog los txiav txim siab seb puas yuav tsum muaj qee qhov kev teeb tsa tshwj xeeb, xws li kev xaiv cov ntsia hlau tshwj xeeb rau kev tsim cov PA, PC thiab lwm yam khoom siv, thiab cov khoom siv sib txuas yog xav tau rau kev tsim cov pwm nrog cov tub ntxhais rub lossis xov tshem tawm; Thib peb, nws yog ib qho tsim nyog los txiav txim siab seb puas yuav xaiv qee lub tshuab txhaj tshuaj molding nrog cov haujlwm tshwj xeeb raws li cov qauv pwm, cov khoom zoo thiab lwm yam. Piv txwv li, thaum tsim nyias-walled ntev cov khoom lag luam (feem ntau l / d> 300), nws yog ib qho tsim nyog los xaiv precision tag nrho kaw lub voj tswj kev txhaj tshuaj molding tshuab.
Locking quab yuam teeb tsa
Nyob rau hauv txoj kev xav, lub clamping quab yuam tuaj yeem xam raws li cov qauv hauv qab no:
Fcm>=K × P Nruab Nrab × Khoom A × kaum
Qhov twg: Fcm - pwm xauv quab yuam, (KN)
K – yam kev nyab xeeb, feem ntau yog 1-1.2
P nruab nrab - nruab nrab siab ntawm pwm kab noj hniav (MPa)
Ib qho khoom lag luam - qhov siab tshaj plaws ntawm thaj tsam ntawm cov khoom ntawm qhov seem ntawm cov pwm (cm2)
Hauv kev tsim khoom tiag tiag, kev hloov kho ntawm lub zog clamping yuav tsum coj mus rau hauv tus account qhov cuam tshuam ntawm thermal expansion ntawm pwm thaum lub sij hawm tsim khoom, thiab feem ntau tawm ntawm cov npoo ntawm 0.1-0.2mm; Lub hauv paus ntsiab lus ntawm pwm locking quab yuam yog los xyuas kom meej qhov zoo ntawm cov khoom uas tsis muaj pwm locking quab yuam.
Kev txhaj tshuaj molding txheej txheem parameter teeb tsa
Lub chim kub thiab pwm kub yog teem raws li cov khoom ntawm cov khoom yas sib txawv. Qhov ntsuas kub feem ntau yog 10 degree - 30 degree siab dua li cov yas melting point. Nws yuav tsum tau muab sau tseg tias lub melting point thiab tso cai nyob rau lub sij hawm nyob rau hauv lub chim ntawm cov ntaub ntawv uas muab los ntawm txawv manufacturers kuj yuav txawv vim txawv synthetic txoj kev los yog hom additives. Table 1 ntawm nplooj ntawv nram qab no piv cov ntsiab lus melting thiab lub sij hawm tso cai nyob ntawm ntau yam kub ntawm PA66 (hom 21SPC) ntawm Solutia thiab PA66 (hom 25AE1) ntawm Rhodia.
Cov pwm kub feem ntau yog txias los ntawm cov dej ntws thaum nws tau teeb tsa, tab sis thaum tsim cov khoom lag luam nrog qhov siab precision loj lossis qhov yuav tsum tau ua kom zoo, cov pwm kub tshuab uas tuaj yeem tswj tau zoo yuav tsum tau siv raws li cov txheej txheem.
Table 1 Sib piv ntawm melting point thiab tso cai nyob rau lub sij hawm ntawm txawv hom ntawm PA66
Txhaj tuav lub sijhawm thiab lub sijhawm txias
Lub sijhawm txhaj tshuaj, lub sijhawm tuav lub sijhawm thiab lub sijhawm txias yuav tsum tau teeb tsa raws li cov khoom tuab, pwm kub, cov khoom siv, thiab lwm yam. Lub sijhawm txhaj tshuaj feem ntau tau teem sijhawm me ntsis ntev dua lub sijhawm rau cov ntsia hlau ua kom tiav qhov kev txhaj tshuaj stroke txav. Lub sijhawm txhaj tshuaj ntev dhau lawm yuav tsis tsuas yog tsim cov teebmeem tsis zoo xws li kev siv tshuab thiab siv zog ntau ntxiv, tab sis kuj ua rau lub voj voog molding ntev. Lub sij hawm tuav lub siab yog teem raws li lub thickness ntawm cov khoom. Lub sij hawm tuav lub sij hawm tsis tas yuav tsum tau rau nyias-walled khoom thaum lub sij hawm molding; Thaum teeb tsa lub sijhawm tuav lub sijhawm, tsuav yog tsis muaj kev nyuaj siab pom tseeb ntawm qhov khoom, nws kuj tuaj yeem txiav txim siab los ntawm txoj kev hnyav. Lub sijhawm tuav lub sijhawm zoo tshaj plaws tuaj yeem txiav txim siab los ntawm maj mam ncua lub sijhawm tuav lub sijhawm kom txog thaum cov khoom zoo tsis hloov lawm. Lub sijhawm txias kuj yuav tsum tau txiav txim siab raws li cov khoom tuab, pwm kub thiab cov khoom siv. Feem ntau, lub sijhawm txias ntawm amorphous polymer yog ntev dua li ntawm crystalline polymer.
Txhaj siab thiab ceev
Kev teeb tsa ntawm kev txhaj tshuaj siab yuav tsum ua raws li lub hauv paus ntsiab lus ntawm qhov qis dua li qhov siab, tsuav nws tuaj yeem muab lub zog txaus kom ncav cuag qhov xav tau txhaj tshuaj ceev, kom cov yaj tuaj yeem ua kom cov pwm tuaj yeem ua rau cov kab noj hniav zoo, siab dhau heev yuav yooj yim ua rau muaj kev ntxhov siab sab hauv. cov khoom; Txawm li cas los xij, thaum molding cov khoom nrog qhov siab qhov tseeb, txhawm rau tiv thaiv cov khoom siv ntau dhau, kev txhaj tshuaj siab tuaj yeem siv los txo cov shrinkage ntawm cov khoom tom qab demoulding.
Kev txhaj tshuaj nrawm yuav cuam tshuam rau cov tsos zoo ntawm cov khoom, thiab nws qhov chaw yuav tsum yog raws li cov qauv geometric ntawm cov pwm, cov pa paug, thiab lwm yam. Feem ntau, ntawm qhov chaw ntawm kev ua kom zoo zoo, sim txhim kho qhov kev txhaj tshuaj kom txo tau. lub sijhawm filling. Hauv kev txhaj tshuaj molding, thaum cov yaj ntws hauv cov pwm, cov pwm phab ntsa yuav tsim txheej txheej, yog li txo qhov tuab ntawm cov dej ntws. Feem ntau, raws li cov qauv pwm thiab kev txhaj tshuaj nrawm, cov pwm phab ntsa yuav muaj txheej txheej txheej ntawm 0.2mm. Yog li ntawd, kev txhaj tshuaj nrawm feem ntau yog siv hauv molding.
Txhaj mob stroke, multi-level txhaj tsis
Hauv molding, txhaj tshuaj stroke yuav tsum tau txiav txim ua ntej. Hauv txoj kev xav, kev txhaj tshuaj stroke tuaj yeem xam raws li hauv qab no:
S1=4(CVp plus Va)/ ρ Ds2
Qhov twg: S1 - txhaj tshuaj stroke Vp - cov khoom ntim
ρ- Resin ceev C - tus naj npawb ntawm kab noj hniav
Va - rooj vag ntim Ds - ntsia hlau taub
Hauv kev tsim khoom tiag tiag, yog tias tag nrho qhov hnyav ntawm "cov khoom lag luam ntxiv rau lub rooj vag" paub, qhov kev txhaj tshuaj tuaj yeem raug xam los ntawm cov qauv hauv qab no:
S1=(M/Mmax) · Smax plus (5 ~ 10)mm
Qhov twg: S1 --- txhaj tshuaj stroke, mm
M - Tag nrho qhov hnyav ntawm "cov khoom ntxiv rau rooj vag", g
Mmax - qhov siab tshaj plaws ntawm kev txhaj tshuaj molding tshuab, g
Smax - qhov siab tshaj plaws txhaj tshuaj ntawm kev txhaj tshuaj molding tshuab, mm
Vim muaj qhov sib txawv ntawm cov duab geometric ntawm cov neeg khiav dej num thiab ntau qhov chaw ntawm cov pwm, txhawm rau ua kom tau raws li cov khoom lag luam zoo, cov khoom sib txawv muaj cov kev xav tau sib txawv rau lub xeev ntws ntawm cov pwm-sau yaj (tsuas yog hais txog lub siab thiab ceev thaum lub sijhawm. ntws). Nyob rau hauv ib qho kev txhaj tshuaj, thaum lub hau ntswj thawb lub yaj mus rau hauv pwm, nws yuav tsum tau ua kom tiav siab sib txawv thiab ceev ntawm ntau txoj haujlwm, uas yog hu ua multi-stage txhaj molding.
Feem ntau, nws yog qhov kev tshawb fawb ntau dua los teeb tsa tsawg kawg peb lossis ntau qhov kev txhaj tshuaj rau cov khoom yas thaum lub sij hawm molding, uas yog, thawj seem yog nyob rau hauv lub ntsiab khiav, qhov thib ob yog los ntawm tus khiav mus rau lub rooj vag, seem peb yog hais txog 90. feem pua ​​ntawm cov kab noj hniav uas muaj cov khoom, thiab cov seem seem yog seem plaub. Txoj kev ntsuas qhov hnyav tuaj yeem siv los txiav txim siab hloov txoj haujlwm ntawm txhua ntu; Hauv kev tsim khoom tiag tiag, cov txheej txheem kev txhaj tshuaj ntau theem yuav tsum tau tshawb fawb txog kev tshawb fawb thiab tsim nyog raws li cov khoom tsim nyog, cov qauv khiav, cov pwm tso tawm, thiab lwm yam.
Feem ntau, txoj kev hloov kho thiab kev soj ntsuam tuaj yeem siv los teeb tsa lub siab / nrawm ntawm qhov hloov pauv qhov xav tau rau kev txhaj tshuaj rau 0, saib xyuas cov kev taw qhia yaj thiab cov khoom tsis zoo, thiab maj mam kho kom txog thaum qhov chaw tsim nyog taw tes yog pom. Txawm li cas los xij, nyob rau hauv tus txheej txheem ntawm kev debugging thiab kev soj ntsuam, yuav tsum tau them nyiaj mloog mus rau lub demoulding mob ntawm cov khoom nyob rau hauv txhaj tshuaj kom tsis txhob pwm sticking vim under-injection ntawm ib co concave qhov chaw ntawm pwm.
Lwm yam txheej txheem tsis
Hauv kev txhaj tshuaj molding, ntxiv rau qhov teeb tsa ntawm ntau qhov tseem ceeb, xws li molding kub, siab, ceev, lub sij hawm, thiab ntau theem txhaj tshuaj hloov txoj hauj lwm, muaj ntau lwm yam txheej txheem tsis, xws li rov qab siab, ntsia hlau ceev, ntsia hlau rewind. , anti-flow thiab lwm yam kev nqis tes ua parameter, uas tsis tuaj yeem tsis quav ntsej.
Piv txwv ntawm cov txheej txheem parameter teeb tsa
Siv cov khoom ntawm nylon cable ties ua piv txwv, cov khoom yuav tsum tau zoo yog: cov khoom ua tau raws li cov qauv nruj nruj; Qhov saum npoo yuav tsum tsis muaj nyiaj hlau, npuas, shrinkage cim thiab lwm yam tshwm sim tsis zoo; Tom qab tsim, cov khoom muaj zoo nruj thiab tsis muaj looseness. Cov khoom siv yog PA66; Lub tshuab txhaj tshuaj molding yog JSW1000-EII-SP, cov qauv pwm yog hom kub khiav, thiab hom rooj vag yog qhov rooj qhov rooj.
Ua ntej, cov txheej txheem parameter teeb tsa txoj cai yog txiav txim siab raws li cov khoom lag luam thiab cov qauv pwm:
(1) Vim tias cov khoom ntws ntev ntev, L / t (ntws mus rau phab ntsa thickness piv) yog 511, kev txhaj tshuaj kub ceev yuav tsum raug xaiv;
(2) Lub rooj vag hom yog lub rooj vag taw tes, thiab siab dua yuav tsum tau siv los kov yeej qhov kev tawm tsam thaum khiav;
(3) Txhawm rau kom ntseeg tau tias cov khoom ntim tau zoo, cov khoom siv molten yuav tsum muaj fluidity zoo thiab molding kub yuav tsum tsim nyog siab;
(4) Thaum muaj kev kub siab thiab kev kub ceev yog txhaj rau qhov kawg, nws yooj yim los tsim flash. Lub tshuab molding yuav tsum muaj lub siab inertia tsawg thiab hloov ceev;
(5) Vim tias cov phab ntsa tuab ntawm cov khoom me me, kev tuav tuav tsis tuaj yeem siv; Saib Table 2 rau cov txheej txheem tseem ceeb ntawm kev tsim.
Table 2 Moulding Process Parameters ntawm cov khoom siv pluaj
Txhawm rau tsim cov txheej txheem kev txhaj tshuaj, nws yuav tsum nkag siab cov ntaub ntawv ntawm kev ua haujlwm ntawm cov cuab yeej, pwm qauv, cov khoom siv molding thiab cov khoom yuav tsum tau ua, thiab teem lub molding tsis scientifically thiab tsim nyog.
Ua ntej ntawm tag nrho cov, cov txheej txheem tsis yuav tsum tau kho cov kauj ruam yog kauj ruam raws li cov khoom tsim tej yam kev mob. Qhov kev hloov kho kom raug yog siab → ceev → kub. Txhua lub sij hawm qhov parameter hloov, qhov input parameter tau raug lees paub los ntawm lub computer ua ntej qhov kev hloov pauv tom ntej. Nws yuav tsum raug zam kom tsis txhob hloov ntau tshaj ob lub sijhawm tib lub sijhawm; Thib ob, nyob rau hauv cov txheej txheem ntawm cov khoom ruaj khov, cov kev txwv yuav tsum tau khaws cia kom ruaj khov li sai tau, thiab cov ntaub ntawv ntxaws ntxaws yuav tsum tau ua. Yog tias qhov kev hloov pauv loj dhau, cov laj thawj yuav tsum pom nyob rau lub sijhawm. Tsis tas li ntawd, cov txheej txheem molding yuav tsum tau kho kom ntau li ntau tau thaum cov pwm muab tso rau hauv online txhua lub sijhawm, txhawm rau pab txhawb kev tswj xyuas cov khoom tiav.